Reply by Dan Lyke

I have the Festool C12, and, admittedly, I haven’t done a whole lot of shopping around since buying it (as a part of the sander/jigsaw/drill tool package), but the motion control geek in me loves the whole brushless motor thing. And I’ve used it extensively with a sanding drum…

But I’d also check with your local electronics store for aftermarket batteries, usually the plastic that these things are packed in are just packaging for a bunch of stock size cylindrical cells, and you can probably swap those out at your local Batteries+ or components store for quite a bit less than DeWalt wants.